U.S. patent application number 10/402715 was filed with the patent office on 2003-10-02 for bone-dislocating device.
Invention is credited to Corti, Guido.
Application Number | 20030186194 10/402715 |
Document ID | / |
Family ID | 11449051 |
Filed Date | 2003-10-02 |
United States Patent
Application |
20030186194 |
Kind Code |
A1 |
Corti, Guido |
October 2, 2003 |
Bone-dislocating device
Abstract
A bone-dislocating device suitable for being inserted in a bone
to be dislocated (16), in particular a maxillary or jaw bone,
comprises a wedged body (12), subdivided into two parts (12a and
12b) substantially having a triangular section, said wedged body
(12) being equipped with driving elements (17) close to an upper
end, for spacing the two parts (12a and 12b) of the wedged body
(12).
Inventors: |
Corti, Guido; (Bologna,
IT) |
Correspondence
Address: |
James V. Costigan, Esq.
Hedman & Costigan, P.C.
1185 Avenue of the Americas, Suite 2003
New York
NY
10036-2646
US
|
Family ID: |
11449051 |
Appl. No.: |
10/402715 |
Filed: |
March 28, 2003 |
Current U.S.
Class: |
433/153 |
Current CPC
Class: |
A61B 17/666 20130101;
A61C 8/0033 20130101; A61B 17/0206 20130101; A61C 8/0089
20130101 |
Class at
Publication: |
433/153 |
International
Class: |
A61C 003/00 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 29, 2002 |
IT |
MI2002U 000173 |
Claims
1. A bone-dislocating device suitable for being inserted into a
bone to be dislocated (16), in particular a maxillary or jaw bone,
characterized in that it comprises a wedged body (12), subdivided
into two parts (12a and 12b) substantially having a triangular
section, said wedged body (12) being equipped with driving elements
(17) close to an upper end, for spacing the two parts (12a and 12b)
of the wedged body (12).
2. The device according to claim 1, characterized in that said two
parts (12a and 12b) are joined to a lower apex (14).
3. The device according to claim 1, characterized in that said
wedged body (12) is equipped in a portion (11) to be inserted in
said bone (16) with a knurled section (15), suitable for
facilitating the insertion of said dislocating device (10) into
said bone (16) and preventing its accidental expulsion under the
pressure of the reaction forces exerted for dislocating said bone
(16).
4. The dislocating device according to claim 1, characterized in
that said two parts (12a and 12b) of the wedged body are specular
with respect to a symmetry plane (13).
5. The device according to claim 4, characterized in that said
driving elements (17) act in a perpendicular direction to said
symmetry plane (13).
6. The device according to claim 1, characterized in that said
driving elements consist of a driving screw (17).
7. The device according to claim 6, characterized in that said
driving screw (17) is respectively inserted in a threaded hole (18)
of one part (12a or 12b) and firmly rests against said opposite
part (12b or 12a) of said wedged body (12).
8. The device according to claim 7, characterized in that said
opposite part (12b or 12a) is equipped with a housing suitable for
lodging an end of said screw (17).
9. The device according to claim 1, characterized in that it is
made of a material resistant to mechanical stress.
10. The device according to claim 9, characterized in that said
material is surgical steel or titanium.
Description
[0001] The present invention relates to a bone-dislocating device,
in particular a bone dislocator used in dental surgery.
[0002] In dental surgery, it may be necessary to intervene on the
maxillary or jaw bone separating it to a certain extent in the
intervention point for the correction of bone defects, even
minimum.
[0003] Bone defects can be particularly found in patients remaining
for a long period without one or more dental elements, thus being
exposed to bone re-absorption phenomena even of a considerable
degree. When the residual bone has an insufficient thickness, it is
not possible to insert oral osteo-integrated plants, which
substitute the missing dental element.
[0004] Bone dislocation is currently effected by means of osteotomy
or splint-crest techniques using so-called bone scalpels.
[0005] The main disadvantage concerns the high degree of trauma
following the intervention and the risk of causing fractures in the
bone to be dislocated or even necrosis.
[0006] An objective of the present invention is to provide a
bone-dislocating device which acts with the least possible trauma
and invasiveness.
[0007] Another objective of the present invention is to provide a
bone-dislocating device which can be activated progressively and at
entities which can be programmed.
[0008] A further objective of the present invention is to provide a
particularly simple and functional dislocating device, with reduced
costs.
[0009] These objectives according to the present invention are
achieved with a bone-dislocating device as illustrated in claim
1.
[0010] Further characteristics of a dislocating device are object
of the dependent claims.
[0011] The characteristics and advantages of a bone-dislocating
device according to the present invention will appear more evident
from the following illustrative but non-limiting description,
referring to the enclosed schematic drawings, in which:
[0012] FIG. 1 is a partially sectional schematic view of a
bone-dislocating device in a closed position inserted into a
bone;
[0013] FIG. 2 is a schematic view of the device of FIG. 1 in an
open activated position;
[0014] FIG. 3 is a raised side view rotated by 90.degree. of the
device of FIG. 1, removed from the bone.
[0015] With reference to the figures, these illustrate a
bone-dislocating device, indicated as a whole with 10, comprising a
wedged body 12, subdivided into two parts 12a and 12b, specular
with respect to a symmetry plane 13, substantially having a
triangular section. The two parts of the wedged body 12 are, for
example, joined to each other in a lower vertex 14 and have smooth
facing sides and opposite knurled or stepped sides 15 which extend
to a portion 11 suitable for being inserted in a bone 16. The
knurled portion 15 is oriented so as to facilitate the insertion of
the dislocating device 10 in the bone 16 and prevent its accidental
expulsion under the pressure of the reaction forces exerted for
dislocating the bone.
[0016] At an upper end, the wedged body 12 has driving elements 17,
which act in a perpendicular direction to the symmetry plane 13,
suitable for separating the wedged body 12, and spacing the two
parts 12a and 12b.
[0017] In the embodiment illustrated in the figures, a driving
screw 17 is inserted in a threaded hole 18 of a first part 12a of
the wedged body and is firmly rested against a wail 19 of the
opposite part 12b. In a different embodiment, not shown, the end of
the screw 17 can be lodged in a housing.
[0018] The bone-dislocating device 10, object of the present
invention is made of a material capable of resisting mechanical
stress, for example surgical steel or a hypo-allergenic
biocompatible material such as titanium.
[0019] In particular, the bone-dislocating device 10 must not cause
any significant inflammatory processes in situ during the period in
which it is inserted in the patient's mouth.
[0020] The bone-dislocating device 10 can be applied in both the
maxillary bone and jaw bone, on the left or right side, as it has a
so-called universal shape.
[0021] In order to insert the device into the bone 16, an incision
is made in the paracrestal soft tissues, a gum 20, and an incision
is made, with a surgical cut, in the bone tissue of a length equal
to the portion of bone to be dislocated.
[0022] The dislocating device is then inserted into the bone, for
example with the help of a small hammer, in a closed position, i.e.
with the two parts of the wedged body 12 in contact with each
other. The dislocating device is in a correction position when the
portion 11, with the knurling 15, is inserted in the bone and the
front end with the driving elements 17 is protruding therefrom
(FIG. 1).
[0023] The dislocation of the bone is effected by acting on the
screw 17 which separates the parts 12a and 12b of the wedged body
12, forcing it against the walls of the bone 16 (FIG. 2).
[0024] The dislocation can be effected in a single session or in
several successive sessions, for example after a day, at the
discretion of the surgeon using one or more devices
contemporaneously.
[0025] The bone-dislocating device 10 must in any case remain in
the patient's mouth for a prolonged period, for example about 40
days, to allow the dislocated area and consequently bone tissue to
consolidate in the desired position.
[0026] Should the device be removed immediately, a bioinert
material or plant must be inserted in the same seat to act as
spacer.
[0027] Finally, by acting on the activation screw 17, the device 10
is brought back to a closed position and removed from the bone.
[0028] It is then possible to proceed with the insertion of the
oral osteo-integrated plant in the cavity which has formed in the
bone.
[0029] The bone-dislocating device, object of the present
invention, has the advantage of being only slightly invasive and
causing limited traumas to the bone in which it is inserted,
protecting it from degenerative phenomena, for example
necrosis.
[0030] Furthermore the dislocating device can be advantageously
activated progressively over a period of time at entities which can
be programmed a priori by the surgeon.
* * * * *